September Weather in Fort Worth, United States

Last updated: February 24, 2025

September in Fort Worth, United States, showcases a diverse weather pattern that blends the lingering warmth of summer with a hint of autumn. The maximum temperature can soar to a sizzling 38°C (101°F), while the average settles comfortably at 26°C (79°F). Nights bring a refreshing coolness as temperatures dip to a minimum of 10°C (50°F). With precipitation totaling 68 mm (2.7 in) over about 8 days, the month adds occasional rain to the mix, contributing to a humidity level of 65% that can enhance the sultry atmosphere. This combination of heat and moisture sets the stage for dynamic weather conditions, inviting both locals and visitors to enjoy the unique charm of Fort Worth in September.

September Temperature in Fort Worth

In September, Fort Worth experiences a transition as summer's intensity begins to wane. With minimum temperatures averaging around 10°C (50°F) and maximums peaking at a scorching 38°C (101°F), the month presents a mix of warm days and cooler nights, creating a pleasant juxtaposition. The average temperature, sitting comfortably at 26°C (79°F), indicates lingering warmth, yet the nights invite a slight chill, signaling the onset of autumn. As the month progresses, residents and visitors can enjoy the tail end of summer’s heat while also anticipating the cooler days ahead, making September a vibrant and dynamic time in Fort Worth’s climate cycle.

September Weather in Fort Worth: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Fort Worth, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec474961657582858579685751
Data source: Temperature data for Fort Worth generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Fort Worth

In September, Fort Worth experiences an average precipitation of 68 mm (2.7 in) over 8 days, marking a transitional phase as summer wanes and autumn approaches. This month typically sees a noticeable decrease from the peak of May, which boasts the highest rainfall, and remains consistent with the milder totals of the preceding months, such as August’s 88 mm (3.5 in). The precipitation pattern suggests that while September doesn’t reach the levels of earlier spring months, it still maintains a pivotal role in preparing the region for the wetter October, which averages 134 mm (5.3 in). This steady rhythm of rainfall highlights Fort Worth's climatic shift, fostering a vibrant landscape ready for the seasonal change ahead.

September Precipitation Trends in Fort Worth

The chart displays monthly precipitation patterns in Fort Worth, with values for each month alongside September's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec468795991491003688681345351
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Fort Worth

As summer transitions into fall in Fort Worth, September brings a noticeable drop in humidity levels, settling at 65%, the lowest of the year. This decline marks a significant shift from the sweltering summer months, where July and August saw higher humidity levels at 73% and 66%, respectively. Following a trend of gradual decrease, September’s drier air sets the stage for October’s mild return to 72% humidity, which aligns with the overall seasonal pattern of fluctuating moisture. As we move from the sticky heights of summer into the crispness of autumn, Fort Worth residents can relish in the refreshing change in the atmosphere.

September Average Humidity in Fort Worth

This chart illustrates the average monthly humidity levels in Fort Worth, with September's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how September's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec80%79%78%78%81%78%73%66%65%72%82%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Fort Worth

As September unfolds in Fort Worth, the UV Index remains hefty at 10, categorizing it as very high exposure, which demands careful sun protection strategies. Following the relentless extreme levels of summer, where the UV Index consistently hit 11, September offers a slight reprieve, yet the risk of sunburn persists, with a burn time of only 15 minutes. This trend showcases the lingering intensity of sunlight in the early fall months, suggesting that even as the temperatures cool slightly, vigilance against UV exposure should not wane. For more detailed insights into the UV Index in Fort Worth, explore Fort Worth UV Index.

Maximum UV Index Levels in Fort Worth for September

The chart shows the monthly maximum UV Index (UVI) for Fort Worth in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec478101111111110864
Data source: Fort Worth September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

September Sunshine in Fort Worth

In September, Fort Worth basks in a generous 283 hours of sunshine, marking a significant transition from the blazing summer months. As the hottest period peaks in July with 361 hours, the sun's embrace begins to soften, revealing a gradual decline in daylight that continues into the fall. August holds onto summer's glow with 329 hours, but by September, the city transitions to a more temperate feel, settling into the delightful warmth of early autumn. This trend reflects a seasonal rhythm, where the vibrant sunshine of summer gently yields to the softer rays of fall, inviting residents to enjoy outdoor activities before winter's chill sets in. As the days shorten, Fort Worth remains bathed in sunlight, creating a beautiful backdrop for the month.

Monthly Sunshine Duration in Fort Worth: September Highlighted

The September sunshine duration represents the total number of hours Fort Worth experiences direct sunlight during the month of September, excluding cloudy or obstructed periods. This chart compares the sunshine duration of September with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec175h176h244h261h284h342h361h329h283h266h238h226h
Data source: Fort Worth September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Fort Worth During September

As summer transitions into fall, September in Fort Worth showcases a delightful shift in weather patterns, boasting a 69% chance of sunny days. This marks a notable increase compared to the earlier months of the year, where sunny probabilities hover around the mid to low 50s. Notably, September stands out as one of the sunniest months, even outperforming both August and October, which have rates of 60% and 68% respectively. This trend suggests that as the oppressive heat of summer wanes, residents can expect not only warmer days but also a higher likelihood of clear skies, making it an ideal time for outdoor activities and events.

Percentage of Sunny Days in September in Fort Worth

The chart illustrates the percentage of sunny days in Fort Worth throughout the year, with September highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Fort Worth experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec49%46%59%42%28%47%54%60%69%68%66%52%
Data source: Fort Worth September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Fort Worth in September

As summer fades into fall, September in Fort Worth, United States, marks a gentle transition in daylight hours. With 12 hours of daylight, the city experiences a slight decrease from the summer highs of 14 hours seen in June and July. This reduction hints at the impending autumn chill, yet still offers ample sunshine for outdoor activities. Following the lively summer months, September provides a perfect balance, as daylight decreases gradually toward the approaching winter, settling at 11 hours in October. Embracing the warmth of early fall, residents can savor these lengthening shadows and the beautiful transformation of the season without losing the sun's presence just yet.

Average Daylight Hours in Fort Worth for September

The chart illustrates the variation in daylight duration in Fort Worth throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec10h 15m11h 1m12h13h13h 50m14h 15m14h 1m13h 17m12h 19m11h 19m10h 27m10h 1m
Data source: Fort Worth daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Fort Worth

As summer transitions to autumn in Fort Worth, September brings a noticeable decline in wind speed, averaging 2.8 m/s (6 mph). This marks a continuation of the downward trend observed from the peak winds of early spring, where gusts averaged around 4.8 m/s (11 mph) in March. Following a summer lull, with July hitting a low of 2.7 m/s (6 mph), September’s breezes remain gentle, evoking a sense of calm as temperatures begin to cool. Notably, this month often serves as a bridge to the more dynamic winds of October, where averages rise again to 3.9 m/s (9 mph). Thus, September’s breezy softness aligns perfectly with the shifting seasons, offering a tranquil yet refreshing atmosphere, perfect for outdoor enjoyment.

Average September Wind Speed in Fort Worth

The chart displays monthly wind speed patterns in Fort Worth, with values for each month shown alongside September's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how September's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec3.84.44.84.43.63.22.73.12.8 m/s3.93.84.1
Data source: Fort Worth September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Fort Worth Compares to Other Months

The weather in Fort Worth changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of September's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Fort Worth and find detailed weather information for every month.

September and January exhibit striking contrasts in weather patterns. In September, temperatures range from a mild 10°C (50°F) to a scorching maximum of 38°C (101°F), with an average temperature of 26°C (79°F). This month also sees a moderate amount of precipitation, totaling 68 mm (2.7 in) over about 8 days, while the humidity hovers around 65%. In contrast, January experiences much colder temperatures, with a minimum of -12°C (11°F) and an average of only 8°C (47°F). The maximum temperature reaches a comfortable 27°C (81°F), and precipitation is lower at 46 mm (1.8 in) across 6 days, but with a higher humidity level of 80%. For a closer look at the weather specifics in January, you can visit Fort Worth weather in January.

September and February present strikingly different weather patterns. September boasts warmer temperatures, with averages around 26°C (79°F) and maximums reaching up to 38°C (101°F), alongside moderate humidity at 65%. In contrast, February experiences a much colder climate, with average temperatures around 9°C (49°F) and minimums plunging to -19°C (-2°F). Although both months see a similar number of rainy days, February tends to have slightly higher precipitation at 87 mm (3.4 in) compared to September's 68 mm (2.7 in). For a more detailed look at February weather, check out Fort Worth weather in February.

In comparing the weather of September and March, it's clear that both months exhibit notable differences. September boasts warmer temperatures, with a minimum of 10°C (50°F) and an average high reaching up to 38°C (101°F). In contrast, March experiences cooler conditions, starting at a minimum of -6°C (21°F) and averaging a maximum of 34°C (94°F). Precipitation is also noteworthy, with March receiving slightly more rainfall at 95 mm (3.8 in) over about 9 days, compared to September's 68 mm (2.7 in) over 8 days. Additionally, March tends to have higher humidity at 78%, versus September's 65%. For more detailed insights, check out Fort Worth weather in March.

When comparing the weather in September and April, notable differences emerge. September tends to be warmer, with average temperatures around 26°C (79°F) and maximums reaching up to 38°C (101°F), while April offers milder conditions, averaging 18°C (66°F) and maxing out at 34°C (94°F). Precipitation is more frequent in April, totaling 99 mm (3.9 in) over 7 rainy days compared to September's 68 mm (2.7 in) across 8 days. Additionally, humidity levels are higher in April at 78%, compared to September's 65%. For more details on April weather, check out Fort Worth weather in April.

September typically offers warmer temperatures, with averages reaching up to 26°C (79°F) and maximums soaring to 38°C (101°F), while May presents a cooler average of 24°C (75°F) and maximums of 36°C (98°F). However, May experiences significantly more rainfall, totaling 149 mm (5.9 in) over 11 days compared to September's 68 mm (2.7 in) over 8 days. Humidity levels are also higher in May at 81%, versus September's 65%, contributing to a more muggy feel in spring. For a detailed look at the weather specifics during this month, check out Fort Worth weather in May.

When comparing the weather in September to June, we see some notable differences. September generally has a wider temperature range, with minimums around 10°C (50°F) and maximums reaching up to 38°C (101°F). In contrast, June starts off warmer, with minimum temperatures at 16°C (61°F) and peak temperatures hitting 39°C (102°F). While both months experience occasional rainfall, September tends to have less precipitation with about 68 mm (2.7 in) compared to June's 99 mm (3.9 in), over similar numbers of rainy days (8 in September and 7 in June). Additionally, June's humidity is higher at 78%, compared to September's 65%, contributing to a more sultry feel during the early summer month. For more detailed insights, you can check Fort Worth weather in June.

When comparing the weather in September and July, there are noticeable differences in temperature and precipitation. September tends to have a broader temperature range, with minimums around 10°C (50°F) and maximums reaching up to 38°C (101°F), averaging 26°C (79°F). In contrast, July is generally warmer, with minimum temperatures at 18°C (64°F) and maximums soaring to 42°C (108°F) while averaging 30°C (86°F). Precipitation is more frequent in September, with 68 mm (2.7 in) over 8 days, compared to July's drier conditions, which see only 36 mm (1.4 in) of rain across 6 days. Additionally, July's humidity is slightly higher at 73%, compared to September's 65%. For more details on July's weather, you can explore Fort Worth weather in July.

In comparing the weather of September and August, September offers slightly cooler temperatures with an average of 26°C (79°F), compared to August's higher average of 29°C (85°F). The maximum temperature in September reaches 38°C (101°F), which is only slightly lower than August's peak of 40°C (105°F). September also experiences a reduction in precipitation, with 68 mm (2.7 in) falling over 8 days, while August has a higher total of 88 mm (3.5 in) over 7 days. Humidity levels remain quite similar, with September at 65% and August at 66%. For more details on August weather, you can check Fort Worth weather in August.

In September, the weather is characterized by warm temperatures, with a minimum of 10°C (50°F) and an average high of 26°C (79°F), peaking at a scorching 38°C (101°F). The month experiences 68 mm (2.7 in) of precipitation spread over 8 days, accompanied by a humidity level of 65%. In contrast, October sees a significant drop in minimum temperatures to 1°C (34°F), while the average temperature decreases to 20°C (68°F) and max temperatures reach up to 36°C (98°F). This month also brings increased rainfall, totaling 134 mm (5.3 in) over the same number of days, resulting in a slightly higher humidity level of 72%. For more specifics on October weather, check out Fort Worth weather in October.

In September, the weather is characterized by warm temperatures, with averages reaching as high as 26°C (79°F) and maximums soaring up to 38°C (101°F), accompanied by a relatively moderate level of humidity at 65%. With about 68 mm (2.7 in) of precipitation over 8 days, September tends to have more rainfall than November. In contrast, November experiences significantly cooler temperatures, with a minimum of -5°C (23°F) and an average of 14°C (57°F), while still allowing for upper temperatures around 34°C (93°F). Interestingly, even though November only sees approximately 53 mm (2.1 in) of rain over 5 days, the humidity rises to 82%. This shift in weather brings a stark change from the heat of September to the chill of November. For more details, you can check Fort Worth weather in November.

September and December present stark contrasts in weather. September typically boasts higher temperatures, with a minimum of 10°C (50°F) and an average soaring to 26°C (79°F), even peaking at 38°C (101°F). In contrast, December's temperatures drop significantly, registering a minimum of -5°C (23°F) and an average of only 11°C (52°F), while the maximum reaches 29°C (85°F). Precipitation is relatively consistent, with September experiencing about 68 mm (2.7 in) over 8 days compared to December's 51 mm (2.0 in) over 7 days. Humidity levels also vary, with September at 65% and December rising to 87%. For more details on December weather specifically, check Fort Worth weather in December.

Compare Fort Worth's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Fort Worth

As summer transitions to fall, September in Fort Worth showcases a unique blend of warmth and occasional relief. With average temperatures hovering around 26°C (79°F), this month serves as a bridge between the intense heat of July and the cooler days of autumn. While maximum temperatures can still soar to 38°C (101°F), the comfortable nights, often dipping to a minimum of 10°C (50°F), offer a welcome respite. The sky may weep lightly as September brings about 68 mm of precipitation over 8 days, introducing bursts of humidity that hover around 65%. This blend of warmth and moisture distinguishes September from the drier, hotter months that precede it, making it an ideal time for outdoor activities. For a deeper look at what to expect throughout the year, check out Fort Worth Climate.